Space-time transmit diversity (STTD) for multiple antennas in radio communications
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United States of America Patent
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Sep 4, 2007
Grant Date -
Apr 8, 2004
app pub date -
Oct 1, 2003
filing date -
Oct 2, 2002
priority date (Note) -
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Abstract
A closed-loop STTD system extended from an open-loop STTD system adopting four antennas transmission diversity technique and its signal transmitting method are disclosed. The signal transmitting method in a closed-loop space-time transmit diversity (STTD) system having a plurality of transmission antennas, includes: space-time coding symbols to be transmitted; classifying the coded symbols to certain groups; and multiplying different weight values to each transmission symbol group and transmitting them.
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